22144215 has 16 divisors (see below), whose sum is σ = 37296000. Its totient is φ = 11188512.

The previous prime is 22144189. The next prime is 22144219. The reversal of 22144215 is 51244122.

It is not a de Polignac number, because 22144215 - 2⁸ = 22143959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22144191 and 22144200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38565 + ... + 39134.

It is an arithmetic number, because the mean of its divisors is an integer number (2331000).

Almost surely, 2^22144215 is an apocalyptic number.

22144215 is a deficient number, since it is larger than the sum of its proper divisors (15151785).

22144215 is a wasteful number, since it uses less digits than its factorization.

22144215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77726.

The product of its digits is 640, while the sum is 21.

The square root of 22144215 is about 4705.7640187328. The cubic root of 22144215 is about 280.8148668884.

Adding to 22144215 its reverse (51244122), we get a palindrome (73388337).

The spelling of 22144215 in words is "twenty-two million, one hundred forty-four thousand, two hundred fifteen".